<template>
  <header class="header">
    <h1>todos</h1>
    <input v-model="isAll" id="toggle-all" class="toggle-all" type="checkbox" />
    <label for="toggle-all"></label>
    <input
      class="new-todo"
      placeholder="输入任务名称-回车确认"
      autofocus
      v-model="taskName"
      @keydown.enter="enterDown"
    />
  </header>
</template>

<script>
export default {
  props: ["list"],
  data() {
    return {
      taskName: "",
    };
  },
  methods: {
    enterDown() {
      if (this.taskName.length === 0) {
        return alert("输入的内容不能为空!");
      }
      this.$emit("addTask", this.taskName);
      this.taskName = "";
    },
  },
  computed: {
    isAll: {
      set(val) {
        // console.log(val);
        this.list.forEach((item) => {
          item.isDone = val;
        });
      },
      get() {
        if (this.list.length === 0) {
          return false
        }
        return this.list.every((item) => {
          return item.isDone;
        });
      },
    },
  },
};
</script>